Do these testers work for MB anti-freeze?? I notice that they all state they are for tesing "ETHYLENE GLYCOL" type antifreeze blends.

I don't think the genuine MB stuff is EG based - as I recall its base is something called "GLUCOSTANE" or something like that.

I tried to use the Prestone tester on some MB antifreeze that I'm sure was mixed 50/50. The tester identified the mixture as 70% antifreeze/ 30% water.....

Tim